1 /* 2 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 /** 26 * @test 27 * @bug 8031320 28 * @summary Verify that on low abort ratio method will be recompiled. 29 * @library /test/lib / 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @build sun.hotspot.WhiteBox 33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 34 * sun.hotspot.WhiteBox$WhiteBoxPermission 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 36 * -XX:+WhiteBoxAPI 37 * compiler.rtm.locking.TestRTMDeoptOnLowAbortRatio 38 */ 39 40 package compiler.rtm.locking; 41 42 import compiler.testlibrary.rtm.AbortProvoker; 43 import compiler.testlibrary.rtm.CompilableTest; 44 import compiler.testlibrary.rtm.RTMLockingStatistics; 45 import compiler.testlibrary.rtm.RTMTestBase; 46 import compiler.testlibrary.rtm.predicate.SupportedCPU; 47 import compiler.testlibrary.rtm.predicate.SupportedVM; 48 import jdk.internal.misc.Unsafe; 49 import jdk.test.lib.Asserts; 50 import jdk.test.lib.process.OutputAnalyzer; 51 import jdk.test.lib.unsafe.UnsafeHelper; 52 import jdk.test.lib.cli.CommandLineOptionTest; 53 import jdk.test.lib.cli.predicate.AndPredicate; 54 55 import java.util.List; 56 57 /** 58 * Test verifies that low abort ratio method will be deoptimized with 59 * <i>rtm_state_change</i> reason and will continue to use RTM-based lock 60 * elision after that. 61 * This test make asserts on total locks count done by compiled method, 62 * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used. 63 * For more details on that issue see {@link TestUseRTMAfterLockInflation}. 64 */ 65 public class TestRTMDeoptOnLowAbortRatio extends CommandLineOptionTest { 66 private static final long LOCKING_THRESHOLD = 100L; 67 private static final long ABORT_THRESHOLD = LOCKING_THRESHOLD / 2L; 68 69 private TestRTMDeoptOnLowAbortRatio() { 70 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 71 } 72 73 @Override 74 protected void runTestCases() throws Throwable { 75 verifyRTMDeopt(false); 76 verifyRTMDeopt(true); 77 } 78 79 private void verifyRTMDeopt(boolean useStackLock) throws Throwable { 80 CompilableTest test = new Test(); 81 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml", 82 useStackLock ? "use" : "no"); 83 84 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 85 logFileName, 86 test, 87 "-XX:+UseRTMDeopt", 88 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 89 useStackLock), 90 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 91 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD), 92 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold", 93 TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD), 94 "-XX:RTMAbortRatio=100", 95 "-XX:CompileThreshold=1", 96 "-XX:RTMRetryCount=0", 97 "-XX:RTMTotalCountIncrRate=1", 98 "-XX:+PrintPreciseRTMLockingStatistics", 99 Test.class.getName(), 100 Boolean.toString(!useStackLock) 101 ); 102 103 outputAnalyzer.shouldHaveExitValue(0); 104 105 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName); 106 107 Asserts.assertEQ(firedTraps, 1, 108 "Expected to get only one deoptimization due to rtm" 109 + " state change"); 110 111 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 112 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 113 114 Asserts.assertEQ(statistics.size(), 2, 115 "VM output should contain two RTM locking " 116 + "statistics entries for method " 117 + test.getMethodWithLockName()); 118 119 RTMLockingStatistics statisticsBeforeDeopt = null; 120 121 for (RTMLockingStatistics s : statistics) { 122 if (s.getTotalLocks() 123 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD) { 124 Asserts.assertNull(statisticsBeforeDeopt, 125 "Only one abort was expected during test run"); 126 statisticsBeforeDeopt = s; 127 } 128 } 129 130 Asserts.assertNotNull(statisticsBeforeDeopt, 131 "After LockThreshold was reached, method should be recompiled " 132 + "with rtm lock eliding."); 133 } 134 135 public static class Test implements CompilableTest { 136 private static final Unsafe UNSAFE = UnsafeHelper.getUnsafe(); 137 private final Object monitor = new Object(); 138 139 @Override 140 public String getMethodWithLockName() { 141 return this.getClass().getName() + "::forceAbort"; 142 } 143 144 @Override 145 public String[] getMethodsToCompileNames() { 146 return new String[] { getMethodWithLockName() }; 147 } 148 149 public void forceAbort(boolean abort) { 150 synchronized(monitor) { 151 if (abort) { 152 Test.UNSAFE.addressSize(); 153 } 154 } 155 } 156 157 /** 158 * Usage: 159 * Test <inflate monitor> 160 */ 161 public static void main(String args[]) throws Throwable { 162 Asserts.assertGTE(args.length, 1, "One argument required."); 163 Test t = new Test(); 164 boolean shouldBeInflated = Boolean.valueOf(args[0]); 165 if (shouldBeInflated) { 166 AbortProvoker.inflateMonitor(t.monitor); 167 } 168 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) { 169 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 170 t.forceAbort(i >= TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD); 171 } 172 } 173 } 174 175 public static void main(String args[]) throws Throwable { 176 new TestRTMDeoptOnLowAbortRatio().test(); 177 } 178 }